Ten milliters of ethanol (ρ=0.789 g/mL) is added to sufficient amount of water to produce 100.0 mL solution. The density

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Ten milliters of ethanol (ρ=0.789 g/mL) is added to sufficient amount of water to
produce 100.0 mL solution. The density of the solution is 0.982 g/mL. Find the
concentration in:
[a] volume %
mass %
[c] mole fraction
[d] molarity
What is the molarity of a solution made when water is added to 11.0 g urea
(MM=60.07) to make 100. mL of solution?
How would you prepare 1.2 L of 0.40 M hydrochloric acid starting from a 2.0 M
solution?